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Cotton needs nutrients

09.09.2020

Like other plants, there are some substances that the cotton plant requires. Examples are nitrogen, copper, zinc, boron, manganese, molybdenum, iodine and phosphorus. S.A. Kudrin provided important information about the cost of the elements required for the production of 1 ton of raw cotton. According to Kudrin, 1 ton of raw cotton requires 11 kg of phosphorus, 50 kg of potassium, 50 kg of nitrogen, 50 kg of calcium, 10 kg of sulfur, sodium and magnesium, less than 50 grams of copper, 200 g of boron and other elements. The most important elements for cotton are nitrogen, phosphorus and potassium.

Nitrogen and Phosphorus

In the early stages of cotton development, there is a greater demand for nitrogen and phosphorus. The period of increasing demand for nutrients coincides with the beginning of budding. The demand for nutrients also increases as the dry mass increases in the budding cotton plant. The dynamics of the accumulation of organic matter are intensively formed from the time of flowering until the cotton fiber matures. As cotton begins to mature, the dry mass increases due to the development of bar organs. This is due to the growth and cutting of vegetative organs. As the dry mass increases, the cotton plant requires more nutrients. The period when cotton consumes the most nutrients is the period from flowering to mass ripening.

But what happens if there is a phosphorus deficiency in the early stages? In this case, the development of the plant's root system slows down and the fruit organs do not form in time. The maximum amount of phosphorus and nitrogen in the vegetative organs often falls during the period of mass flowering. By the time of flowering, almost all of the nitrogen that the cotton plant receives from the soil is used to form leaves. The body's need for nitrogen and other nutrients begins to increase during the formation of the nut.

Potassium

In addition to nitrogen and phosphorus, potassium is another element that the cotton plant needs. While cotton requires more nitrogen from the first stage of development until 2-3 true leaves are formed, the demand for potassium near the end of development is higher than the demand for nitrogen.

If there is a lack of potassium during budding, most of the leaves fall off and the weight of the trunk is reduced. When there is a lack of potassium, the flow of sugars from the leaves to the organs of the bar is disrupted and the formation of structural elements of the seed with fiber is delayed. The demand for potassium increases during the germination and ripening of cotton plants. If the plant gets enough potassium during this period, the weight of the pot and the quality of the fiber will be in any form.